Discovery of tar mats in terrestrial gas-condensate reservoirs and its geological significance

Zhang, Min

doi:10.1007/bf02882875

Cited by 2 publications

(1 citation statement)

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“…Haitaite-(La) was collected from the Haita uranium ore district, where the rare giant crystalline uraninite (crystal size ~1 cm) has been discovered (Zhang et al, 2015;Wang et al, 2017;Wang and Yao, 2020).…”

Section: Occurrence Physical and Optical Propertiesmentioning

confidence: 99%

Haitaite‐(La), LaU⁴⁺Fe³⁺₂(Ti₁₃Fe²⁺4Fe³⁺)_Σ18O₃₈, a New Member of the Crichtonite Group

WANG

Fan

et al. 2022

Acta Geologica Sinica (Eng)

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Haitaite‐(La), (La, Ce)(U4+, U6+, Fe2+)(Fe3+, Al)2(Ti, Fe2+, Fe3+)18O38, is a new member of the crichtonite group. It is named after the Haita Village in the Miyi County of Sichuan Province, China, where the mineral was discovered. The mineral occurs as black opaque centimeter‐sized aggregates in the external contact zone between the Neoproterozoic (∼800 Ma) alkali feldspar granite and the Mesoproterozoic (∼1700 Ma) micaschist. In the studied sample, haitaite‐(La) is associated with other minerals, including ilmenite, magnetite, rutile, zircon, brannerite and uraninite. The new mineral is a black, metallic phase and has a Mohs hardness of 6, with a density of 4.99 g/cm3 (calculated) and 5.03 g/cm3 (measured). Haitaite‐(La) is opaque in transmitted light and grayish‐white under reflected light, with a reflectivity between 22.5% and 16.42% in the 400–700 nm band (SiC, in the air). The compositions of the mineral were measured by EPMA, the U4+/U6+ ratio was determined by X‐ray photoelectron spectroscopy and the Fe2+/Fe3+ ratio was determined by Mössbauer spectroscopy. Haitaite‐(La) is trigonal, belongs to and has unit‐cell parameters a = 10.3678(5) Å, c = 20.8390(11) Å, V = 1939.9(2) Å3, Z = 3. The crystalline structure is composed of octahedra with 9 layers of close‐packed octahedra (M1, M3, M4, M5), tetrahedra (M2) and contains large 12‐coordinated M0 sites.

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Section: Occurrence Physical and Optical Propertiesmentioning

confidence: 99%

Haitaite‐(La), LaU⁴⁺Fe³⁺₂(Ti₁₃Fe²⁺4Fe³⁺)_Σ18O₃₈, a New Member of the Crichtonite Group

WANG

Fan

et al. 2022

Acta Geologica Sinica (Eng)

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Distribution characteristics and petroleum gesignificance of the Silurian asphaltic sandstones in Tarim Basin

Zhang¹

2004

Sci China Ser D

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Discovery of tar mats in terrestrial gas-condensate reservoirs and its geological significance

Cited by 2 publications

References 4 publications

Haitaite‐(La), LaU⁴⁺Fe³⁺₂(Ti₁₃Fe²⁺4Fe³⁺)_Σ18O₃₈, a New Member of the Crichtonite Group

Haitaite‐(La), LaU⁴⁺Fe³⁺₂(Ti₁₃Fe²⁺4Fe³⁺)_Σ18O₃₈, a New Member of the Crichtonite Group

Distribution characteristics and petroleum gesignificance of the Silurian asphaltic sandstones in Tarim Basin

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Discovery of tar mats in terrestrial gas-condensate reservoirs and its geological significance

Cited by 2 publications

References 4 publications

Haitaite‐(La), LaU4+Fe3+2(Ti13Fe2+4Fe3+)Σ18O38, a New Member of the Crichtonite Group

Haitaite‐(La), LaU4+Fe3+2(Ti13Fe2+4Fe3+)Σ18O38, a New Member of the Crichtonite Group

Distribution characteristics and petroleum gesignificance of the Silurian asphaltic sandstones in Tarim Basin

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Haitaite‐(La), LaU⁴⁺Fe³⁺₂(Ti₁₃Fe²⁺4Fe³⁺)_Σ18O₃₈, a New Member of the Crichtonite Group

Haitaite‐(La), LaU⁴⁺Fe³⁺₂(Ti₁₃Fe²⁺4Fe³⁺)_Σ18O₃₈, a New Member of the Crichtonite Group